Little Nightmares on Steam
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Immerse yourself in Little Nightmares, a dark whimsical tale that will confront you with your childhood fears! Help Six escape The Maw – a vast, mysterious vessel inhabited by corrupted souls looking for their next meal.

However you do not get the mini DLCs that add some side chapters.

So as the old saying goes: Pirate it anyway.

But if you add it now to your account it will stay in there forever.